From alpine
ARG CN=0
RUN [ $CN -eq 1 ] && sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories; \
    apk update && \
    apk add \
    jq \
    bash \
    curl \
    bind-tools
WORKDIR /opt
ADD . .
CMD ./coretest.sh
